<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
	</body>
	<script type="text/javascript">
		var obj={
			get a(){
//				return 2;
				return this._a_;
			},
			set a(val){
				this._a_=val;
			}
		}
		
		obj.a=3;
		console.log(obj.a);
		
		
//		var result =Object.getOwnPropertyDescriptor(obj,"a");
//		console.log(result);
	</script>
</html>

